Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aea4781e27062070166ca62737156f3edbbfb4425c65895f514e6c6765a30bb2' 
  AND token = 'SRPbedU8OzYiuqwiLGiagTPVfAvbk0iHPkFvx7FzDdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}